Learn why Amazon DynamoDB is best described as a NoSQL database in the AWS Certified Cloud Practitioner CLF-C02 exam. Understand its features, scalability, and serverless architecture.
Question
Which characteristic describes Amazon DynamoDB?
A. Relational database
B. Document database
C. NoSQL database
D. Data warehouse
Answer
C. NoSQL database
Explanation
Amazon DynamoDB is a fast and flexible NoSQL database service, designed for internet-scale applications, providing high performance, scalability, and reliability.
Amazon DynamoDB is a NoSQL database that is fully managed, serverless, and designed to deliver high performance with single-digit millisecond latency at any scale. Below is a detailed explanation of why this is the correct answer:
Key Characteristics of DynamoDB
NoSQL Data Model
DynamoDB supports key-value and document-based data models, making it a NoSQL database. Unlike relational databases, it does not enforce a fixed schema, allowing for flexibility in data structure.
It stores data in tables, with each table containing items (rows) and attributes (columns), but without predefined relationships between tables.
Serverless and Fully Managed
DynamoDB eliminates the need for server provisioning, maintenance, or scaling. AWS automatically handles infrastructure management, including hardware provisioning, patching, and scaling based on traffic.
Massive Scalability
DynamoDB is designed to handle internet-scale applications, supporting trillions of requests per day. It automatically partitions data across servers to ensure consistent performance as workloads grow.
Performance
It delivers predictable single-digit millisecond latency for read and write operations, making it ideal for real-time applications like gaming, IoT, and e-commerce.
Additional Features
- Supports ACID transactions for complex business logic.
- Offers global tables for multi-region replication with 99.999% availability.
- Provides built-in security features like encryption at rest and fine-grained access control through AWS Identity and Access Management (IAM).
Why Not the Other Options?
A. Relational Database: DynamoDB is not relational; it does not use SQL or enforce table relationships like traditional RDBMS systems such as MySQL or PostgreSQL.
B. Document Database: While DynamoDB can store documents as part of its flexible schema, it is primarily categorized as a NoSQL database because it supports both key-value and document data models.
D. Data Warehouse: DynamoDB is not a data warehouse; services like Amazon Redshift are designed for analytical workloads and large-scale data aggregation rather than operational NoSQL workloads.
In summary, Amazon DynamoDB’s defining characteristic is that it is a NoSQL database, providing flexibility, scalability, and low-latency performance for modern applications.
Amazon AWS Certified Cloud Practitioner CLF-C02 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Amazon AWS Certified Cloud Practitioner CLF-C02 exam and earn Amazon AWS Certified Cloud Practitioner CLF-C02 certification.